My current workplace is very relaxed. I do continue working outside of the office-time and I'm sure that I deliver, but

I regularly start at 10am+, sometimes 11 or 11:30. That doesn't keep me from leaving at ~6pm - it's mostly to have some office time (highly overrated in my opinion).

I'm not going to bed before 1pm, most of the time I pass 2pm as well.

I start checking my mail and notifications as soon as I wake up around 7:30, but I don't get in to the office until 9::30-10. I usually leave the office at 7pm. Startups can be a time-sink.

I usually go to sleep between 11:30 pm-12:30 am and wake up around 8 am. I'm at my lab (grad student) by 9:30 am.

I usually go to bed around 1 and wake at 8:30 to get in to work before 10.